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Dielectric properties of layered silicate‐reinforced natural and polyurethane rubber nanocomposites
Author(s) -
Psarras G. C.,
Gatos K. G.,
KargerKocsis J.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26831
Subject(s) - nanocomposite , materials science , natural rubber , composite material , polyurethane , dielectric , polymer , glass transition , silicate , compounding , dielectric loss , chemical engineering , optoelectronics , engineering
Abstract Natural rubber (NR), polyurethane rubber (PUR), and NR/PUR‐based nanocomposites were prepared by adding a pristine synthetic layered silicate (LS; sodium fluorohectorite) in 10 parts per hundred parts rubber, following the latex compounding route. The dispersion of the LS latices in the composites was studied by means of X‐ray diffraction (XRD) and transmission electron microscopy (TEM). The morphology‐dependent dielectric properties of the produced nanocomposites were examined using broadband dielectric spectroscopy (BDS) at ambient temperature. Besides the glass/rubber transition of the polymer matrices, interfacial polarization (IP) is evident in the produced nanocomposites. The α‐relaxation, as well as the β‐mode, in the PUR‐containing nanocomposites proved to be less affected by the presence of LSs. The obtained experimental data suggest that the LS is more compatible with and thus better intercalated by the PUR than by the NR which was prevulcanized in this case. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007